select * from dba_extents where 3056 between block_id and block_id + blocks and file_id=3;
这里的3056是什么，应该是dba吧，是不是写错了，你这案例的dba应该是13970 吧！

谢谢,确实在写blog时出现失误,已经更正

Applies to:
Oracle Server - Enterprise Edition - Version: 10.2.0.3 and later[Release: 10.2 and later ]
Information in this document applies to any platform.
***Checked for relevance on 28-Feb-2012***

Symptoms
1. The following error is occurring in the alert.log:

ORA-00600: internal error code, arguments: [6749], [6], [12605862], [78], [], [], [], []

2. The trace file may report the DBA and block number for the error. 
If it does not, please engage Oracle Support for assistance:

TRACE FILE ataccess_j000_8790.trc 
-------------------------------------------------------- 
*** SESSION ID:(133.1713) 2007-11-02 16:00:45.275 
Dumping current redo log in thread 1 

DUMP OF REDO FROM FILE '/u04/oradata/ACCESS16/ataccess/redo4.log' 
Opcodes 11.* 
DBAs (file#, block#): (3, 22950) 
RBAs: 0x000000.00000000.0000 thru 0xffffffff.ffffffff.ffff 
SCNs: scn: 0x0000.00000000 thru scn: 0xffff.ffffffff 
Times: creation thru eternity 
FILE HEADER: 
Compatibility Vsn = 169869568=0xa200100 
Db ID=1655231844=0x62a8d564, Db Name='ATACCESS' 
Activation ID=1655191140=0x62a83664 
Control Seq=4582=0x11e6, File size=204800=0x32000 
File Number=4, Blksiz=512, File Type=2 LOG 
3. The table affected is SYSMAN.MGMT_METRICS_RAW:

SELECT tablespace_name, segment_type, owner, segment_name  
    FROM dba_extents  
    WHERE file_id = 3  
    and 22950 between block_id AND block_id + blocks - 1;  

TABLESPACE_NAME  SEGMENT_TYPE OWNER SEGMENT_NAME  
---------------  ------------ ----- ------------  
SYSAUX            TABLE       SYSMAN SYS_IOT_OVER_49869  


select table_name, iot_name from all_tables where table_name like '%IOT%';  

.  
..  
...  

SYS_IOT_OVER_49766 AQ$_MGMT_NOTIFY_QTABLE_G  
SYS_IOT_OVER_49869 MGMT_METRICS_RAW  <<<<<<<------------
SYS_IOT_OVER_49872 MGMT_CURRENT_METRICS  


Cause

This issue was investigated in Bug 6127434 but not resolved due to lack of information.

Abstract: ORA-600[6749] RAISED BY DELETE COMMAND; NO CORRUPTION IDENTIFIED 

Solution

The following workaround may resolve the problem temporarily:

1. Ensure you have a good backup before proceeding.

2. Create a copy of the SYSMAN.MGMT_METRICS_RAW table:

SQL> create table SYSMAN.MGMT_METRICS_RAW_COPY 
as select * from SYSMAN.MGMT_METRICS_RAW;

3. Truncate the table:

SQL> truncate table SYSMAN.MGMT_METRICS_RAW;

May need  to disable trigger: "sysman.raw_metrics_after_insert" before proceeding.  
Re-enable after the insert.

4. Re-insert the rows:

SQL> insert into SYSMAN.MGMT_METRICS_RAW 
select * from SYSMAN.MGMT_METRICS_RAW_COPY; 
SQL> commit;

5. Drop the copy table:

SQL> drop table SYSMAN.MGMT_METRICS_RAW_COPY;